Soccer-Messi kept scoreless in Argentina warmup win

* Argentina beat Trinidad and Tobago 3-0 * Palacio, Mascherano and Rodriguez score (Adds details, Messi quote) By Luis Ampuero BUENOS AIRES, June 4 (Reuters) - Lionel Messi, looking to score his first World Cup goals since 2006 in Brazil this month, went scoreless as Argentina cruised to a 3-0 win over Trinidad and Tobago in a World Cup warmup on Friday. Messi missed several chances in the first